Table 1.

The physical parameters of Te-p_x light electrons and Te-p_y heavy holes derived from the respective plasmon dispersions at 300 K

Physical Parameters	Te-px light electrons	Te-py heavy holes
Effective mass m* (m0)I	0.28	3.41
Carrier density n (cm−3)	2.01 × 1021	1.19 × 1022
Carrier density n, Hall (cm−3)II	7.34 × 1021 (//a)	1.16 × 1022 (//b)
Fermi velocity $v_{\mathrm{F}}$ (cm s−1)	1.61 × 108	0.24 × 108
Fermi wave vector kF (Å−1)	0.39	0.71
Critical wave vector qc (Å−1)	0.3	1.39
Fermi Energy EF (eV)	2.07	0.56

^I The intercepted ${\mathrm{\omega }}_{\mathrm{p}}$ at q → 0 Å^-1 of the heavy-hole plasmon is 1.85 eV.

^II Results by Hall measurements (Supplementary Fig. 7), in which the positive signs of Hall coefficients along both a- and b-axes indicating predominant hole contributions in transports.